WO2016055690A1 - Method for fitting a connecting ring of a cone connector and a fitting tool to be used with a cone connector used in hydraulic systems - Google Patents

Method for fitting a connecting ring of a cone connector and a fitting tool to be used with a cone connector used in hydraulic systems Download PDF

Info

Publication number
WO2016055690A1
WO2016055690A1 PCT/FI2015/050611 FI2015050611W WO2016055690A1 WO 2016055690 A1 WO2016055690 A1 WO 2016055690A1 FI 2015050611 W FI2015050611 W FI 2015050611W WO 2016055690 A1 WO2016055690 A1 WO 2016055690A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
connecting ring
ring
fitting
fitting tool
Prior art date
Application number
PCT/FI2015/050611
Other languages
French (fr)
Inventor
Janne Volanen
Original Assignee
Gs-Hydro Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gs-Hydro Oy filed Critical Gs-Hydro Oy
Publication of WO2016055690A1 publication Critical patent/WO2016055690A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/048—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using presses for radially crimping tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/061—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends a pressure ring being arranged between the clamping ring and the threaded member or the connecting member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
    • F16L19/12—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered with additional sealing means

Definitions

  • the invention relates to a method for fitting a connecting ring of a cone connector used in hydraulic systems, said cone connector comprising a connector body, a tightening nut and a connecting ring with internal teeth to be fitted on a pipe to be connected by means of the cone connector.
  • the invention also relates to a fitting tool to be used with a cone connector used in hydraulic systems, said cone connector comprising a connector body, a tightening nut and a connecting ring with internal teeth to be fitted on a pipe.
  • Fig. 1 shows a cross section of a typical 24° cone connector having a body 1, a tightening nut 2 and a cutting ring 3 on a pipe 4.
  • the cutting ring is pre-fitted on the pipe 4 by tightening the nut, creating axial movement towards the fitting body cone that forces the ring to bite into the pipe.
  • connection is completed by tightening the nut 2 with a certain torque, whereby the nut 2 and the pipe with a pre-fitted cutting ring move towards the body 1 and the outer cone of the cutting ring and the inner cone of the body 1 are brought into abutment to each other.
  • This connection has been proven satisfactory per se, but it requires a skilled person to pre-fit the cutting ring correctly.
  • An aim of the present invention is to provide a novel solution for pre-fitting the connecting ring on the pipe to be connected by the cone connector.
  • the method of the present invention is characterized in that the method comprises the steps of:
  • the fitting tool of the present invention is characterized in that the fitting tool comprises a plurality of radially movable dies which together define a receiving space for the connecting ring, said dies being arranged to apply a radial force on the connecting ring to drive the teeth into the pipe wall by crimping the connecting ring.
  • Fig. 1 shows an example of a 24° cone connector in accordance with ISO
  • FIG. 2 shows an embodiment of the cone connector of the invention
  • Fig. 3 shows an embodiment of a fitting tool of the invention
  • Fig. 4 shows a partial isometric view of the fitting tool of Fig. 3
  • Fig. 5 shows a part of the fitting tool placed on a pipe to press the
  • the cone connector of the invention comprises a connecting body 1, a tightening nut 2 and a connecting ring 3 placed on a pipe 4 near an end 7 of the pipe.
  • the connecting ring 3 is pre-fitted on the pipe 4 by using a fitting tool 5 which will be described below.
  • the fitting tool applies a radial force on the connecting ring 3 and the teeth 6 of the connecting ring bite into the pipe wall 8.
  • connection is completed by placing a seal 15 on the pipe 4 adjacent to the forward end of the connecting ring 3 and by thereafter tightening the nut 2 with a certain torque, whereby the nut 2 and the pipe 4 with the connecting ring 3 and the seal 15 move towards the connecting body 1 and the outer forward end cone of the connecting ring 3 and the inner receiving cone of the connecting body 1 are brought into abutment to each other, the seal 15 securing the connection against leakage.
  • the connecting ring 3 is provided with a stopper surface 17 which is brought into abutment to an end surface 18 of the connecting body 1 in order to avoid excessive tightening of the seal 15 and to form a further metal-to-metal sealing which also supports the connection against vibrations and torsion.
  • the fitting tool comprises radially movable dies 11 provided with connection nipples 16 for hydraulic or pneumatic driving media to move the dies radially inwards or outwards.
  • the dies can be used in a conventional hose gripper.
  • the dies 11 together form a receiving opening 17 for the pipe 4 and the connecting ring 3 thereon.
  • Each die 11 has on its inner surface a receiving space 12 corresponding essentially to the contour of the connecting ring 3, but providing the necessary free space to allow the connecting ring 3 to dilate when compressing the ring 3 by pressing it radially towards the pipe wall 8.
  • the dies 11 are arranged to define a continuous ring 13 around the pipe end between the end surface 10 of the pipe 4 and the receiving space 12.
  • Said continuous ring 13 has an inner diameter corresponding to or slightly larger than the outer diameter of the pipe 14, so that the pipe end is prevented from enlarging due to crimping forces.
  • At least one of the dies 1 is provided with a stopper nose 9 in order to place the connecting ring 3 at a correct distance from the end surface 10 of the pipe 4.
  • the dies 11 are further arranged to define a second continuous ring 14 around the pipe, axially behind the receiving space 12, as seen from the end surface 10 of the pipe 4.
  • Said second ring 14 has an inner diameter corresponding to or slightly larger than the outer diameter of the pipe 4, said second ring 14 forming a stop to avoid excessive crimping.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Abstract

The invention relates to a method for fitting a connecting ring of a cone connector used in hydraulic systems, as well as a fitting tool to be used in the method. Said cone connector comprises a connector body (1), a tightening nut (2) and a connecting ring (3) with internal teeth (6) to be fitted on a pipe (4) to be connected by means of the cone connector. The method comprises the steps of: placing a connecting ring (3) on the pipe (4) near the pipe end (7); placing a fitting tool (5) over the connecting ring (3); applying a radial force to the connecting ring (3) by the fitting tool (5) to crimp the connecting ring (3) so that the teeth (6) of the connecting ring (3) bite into the pipe wall (8).

Description

Method for fitting a connecting ring of a cone connector and a fitting tool to be used with a cone connector used in hydraulic systems
The invention relates to a method for fitting a connecting ring of a cone connector used in hydraulic systems, said cone connector comprising a connector body, a tightening nut and a connecting ring with internal teeth to be fitted on a pipe to be connected by means of the cone connector. The invention also relates to a fitting tool to be used with a cone connector used in hydraulic systems, said cone connector comprising a connector body, a tightening nut and a connecting ring with internal teeth to be fitted on a pipe.
Cone connectors are widely used in hydraulic systems. Usually, cutting rings are used as connecting rings in cone connectors. International Standard ISO 8434-1 describes 24° cone connectors using cutting rings. Fig. 1 shows a cross section of a typical 24° cone connector having a body 1, a tightening nut 2 and a cutting ring 3 on a pipe 4. The cutting ring is pre-fitted on the pipe 4 by tightening the nut, creating axial movement towards the fitting body cone that forces the ring to bite into the pipe. The connection is completed by tightening the nut 2 with a certain torque, whereby the nut 2 and the pipe with a pre-fitted cutting ring move towards the body 1 and the outer cone of the cutting ring and the inner cone of the body 1 are brought into abutment to each other. This connection has been proven satisfactory per se, but it requires a skilled person to pre-fit the cutting ring correctly.
An aim of the present invention is to provide a novel solution for pre-fitting the connecting ring on the pipe to be connected by the cone connector. To this end, the method of the present invention is characterized in that the method comprises the steps of:
placing a connecting ring on the pipe near the pipe end;
placing a fitting tool over the connecting ring;
applying a radial force on the connecting ring by the fitting tool to crimp the connecting ring so that the teeth of the connecting ring bite into the pipe wall. The fitting tool of the present invention is characterized in that the fitting tool comprises a plurality of radially movable dies which together define a receiving space for the connecting ring, said dies being arranged to apply a radial force on the connecting ring to drive the teeth into the pipe wall by crimping the connecting ring.
The invention will be described further with reference to the following drawings, wherein:
Fig. 1 shows an example of a 24° cone connector in accordance with ISO
8434-1, Fig. 2 shows an embodiment of the cone connector of the invention, Fig. 3 shows an embodiment of a fitting tool of the invention, Fig. 4 shows a partial isometric view of the fitting tool of Fig. 3, and
Fig. 5 shows a part of the fitting tool placed on a pipe to press the
connecting ring teeth into the pipe wall.
As shown in Fig. 2, the cone connector of the invention comprises a connecting body 1, a tightening nut 2 and a connecting ring 3 placed on a pipe 4 near an end 7 of the pipe. The connecting ring 3 is pre-fitted on the pipe 4 by using a fitting tool 5 which will be described below. The fitting tool applies a radial force on the connecting ring 3 and the teeth 6 of the connecting ring bite into the pipe wall 8. The connection is completed by placing a seal 15 on the pipe 4 adjacent to the forward end of the connecting ring 3 and by thereafter tightening the nut 2 with a certain torque, whereby the nut 2 and the pipe 4 with the connecting ring 3 and the seal 15 move towards the connecting body 1 and the outer forward end cone of the connecting ring 3 and the inner receiving cone of the connecting body 1 are brought into abutment to each other, the seal 15 securing the connection against leakage. The connecting ring 3 is provided with a stopper surface 17 which is brought into abutment to an end surface 18 of the connecting body 1 in order to avoid excessive tightening of the seal 15 and to form a further metal-to-metal sealing which also supports the connection against vibrations and torsion. Figs. 3 and 4 show an embodiment of the fitting tool 5 of the invention. The fitting tool comprises radially movable dies 11 provided with connection nipples 16 for hydraulic or pneumatic driving media to move the dies radially inwards or outwards. The dies can be used in a conventional hose gripper. The dies 11 together form a receiving opening 17 for the pipe 4 and the connecting ring 3 thereon. Each die 11 has on its inner surface a receiving space 12 corresponding essentially to the contour of the connecting ring 3, but providing the necessary free space to allow the connecting ring 3 to dilate when compressing the ring 3 by pressing it radially towards the pipe wall 8.
The dies 11 are arranged to define a continuous ring 13 around the pipe end between the end surface 10 of the pipe 4 and the receiving space 12. Said continuous ring 13 has an inner diameter corresponding to or slightly larger than the outer diameter of the pipe 14, so that the pipe end is prevented from enlarging due to crimping forces. At least one of the dies 1 is provided with a stopper nose 9 in order to place the connecting ring 3 at a correct distance from the end surface 10 of the pipe 4. The dies 11 are further arranged to define a second continuous ring 14 around the pipe, axially behind the receiving space 12, as seen from the end surface 10 of the pipe 4. Said second ring 14 has an inner diameter corresponding to or slightly larger than the outer diameter of the pipe 4, said second ring 14 forming a stop to avoid excessive crimping.

Claims

Claims
1. Method for fitting a connecting ring of a cone connector used in hydraulic systems, said cone connector comprising a connector body (1), a tightening nut (2) and a connecting ring (3) with internal teeth (6) to be fitted on a pipe (4) to be connected by means of the cone connector, the method comprising the steps of: placing a connecting ring (3) on the pipe (4) near the pipe end (7);
placing a fitting tool (5) over the connecting ring (3);
applying a radial force to the connecting ring (3) by the fitting tool (5) to crimp the connecting ring (3), characterized in that during the crimping the teeth (6) of the connecting ring (3) bite into the pipe wall (8), the fitting tool (5) being designed to position the connecting ring (3) correctly onto the pipe.
2. A fitting tool to be used with a cone connector used in hydraulic systems, said cone connector comprising a connector body (1), a tightening nut (2) and a connecting ring (3) with internal teeth (6) to be fitted on a pipe (4), the fitting tool (5) comprising a plurality of radially movable dies (11) which together define a receiving space (12) for the connecting ring (3), said dies (11) being arranged to apply a radial force on the connecting ring (3) to drive the teeth (6) into the pipe wall (8) by crimping the connecting ring (3) at least one die (11) being provided with stop means (9) to be placed against the end surface (10) of the pipe (4), said stop means defining the correct position of the connecting ring (3) at a certain distance from the end surface (10), characterized in that the dies (11) are arranged to define a continuous ring (13) around the pipe end between the end surface (10) of the pipe (4) and receiving space (12), said continuous ring (13) having an inner diameter corresponding to or being slightly larger than the outer diameter of the pipe (4), so that the pipe end is prevented from enlarging due to crimping forces, and that the dies (11) are arranged to define a second continuous ring (14) around the pipe, axially behind the receiving space (12), as seen from the end surface (10) of the pipe (4), said second ring (14) having an inner diameter corresponding to or being slightly larger than the outer diameter of the pipe (4), said second ring (14) forming a stop to avoid excessive crimping.
PCT/FI2015/050611 2014-10-10 2015-09-15 Method for fitting a connecting ring of a cone connector and a fitting tool to be used with a cone connector used in hydraulic systems WO2016055690A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20145888 2014-10-10
FI20145888A FI125901B (en) 2014-10-10 2014-10-10 Method for Installing a Conical Connector Ring and Mounting Tool for Use with a Conical Connector for Hydraulic Systems

Publications (1)

Publication Number Publication Date
WO2016055690A1 true WO2016055690A1 (en) 2016-04-14

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Family Applications (1)

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PCT/FI2015/050611 WO2016055690A1 (en) 2014-10-10 2015-09-15 Method for fitting a connecting ring of a cone connector and a fitting tool to be used with a cone connector used in hydraulic systems

Country Status (2)

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FI (1) FI125901B (en)
WO (1) WO2016055690A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912337A1 (en) * 1969-03-11 1970-10-01 Walterscheid Kg Jean Tube fitting
FR2406773A1 (en) * 1977-10-24 1979-05-18 Legris France Sa High pressure hydraulic pipe coupling - has ductile olive with internal grooves which is deformed to grip pipe when nut is tightened
US4622732A (en) * 1984-11-23 1986-11-18 Haskel, Inc. Method for forming joints in pressurized fluid systems
WO2011029687A1 (en) * 2009-09-10 2011-03-17 Voss Fluid Gmbh Screwed pipe joint and method for the production thereof
WO2013010784A1 (en) * 2011-07-20 2013-01-24 Voss Fluid Gmbh Pipeline comprising a joining end for a pipe connection, method for the production thereof, and pipe connection comprising such a pipeline
US20140283361A1 (en) * 2013-03-25 2014-09-25 Betaswage Pty Ltd. Pinch Decompression in Radial Crimp Press Machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912337A1 (en) * 1969-03-11 1970-10-01 Walterscheid Kg Jean Tube fitting
FR2406773A1 (en) * 1977-10-24 1979-05-18 Legris France Sa High pressure hydraulic pipe coupling - has ductile olive with internal grooves which is deformed to grip pipe when nut is tightened
US4622732A (en) * 1984-11-23 1986-11-18 Haskel, Inc. Method for forming joints in pressurized fluid systems
WO2011029687A1 (en) * 2009-09-10 2011-03-17 Voss Fluid Gmbh Screwed pipe joint and method for the production thereof
WO2013010784A1 (en) * 2011-07-20 2013-01-24 Voss Fluid Gmbh Pipeline comprising a joining end for a pipe connection, method for the production thereof, and pipe connection comprising such a pipeline
US20140283361A1 (en) * 2013-03-25 2014-09-25 Betaswage Pty Ltd. Pinch Decompression in Radial Crimp Press Machines

Also Published As

Publication number Publication date
FI20145888A (en) 2016-03-31
FI125901B (en) 2016-03-31

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